TA6038FN/FNG TOSHIBA Bipolar Linear Integrated Circuit Silicon Monolithic TA6038FN,TA6038FNG Shock Sensor IC TA6038FN/FNG detects an existence of external shock through the shock sensor and output. Features • TA6038FN/FNG operates from 2.7 to 5.5 V DC single power supply voltage. • Signal from the shock sensor is amplified according to setting gain, and is detected through the internal window comparator. • TA6038FN/FNG incorporates 1-ch shock detecting circuitry. • Input terminal of sensor signal is designed high impedance. • LPF (low pass filter) circuitry is incorporated. • Sensitivity of shock detection can be adjusted by external devices. • Small package Weight: 0.04 g (typ.) Differential input impedance = 100 MΩ (typ.) Cut-off frequency of LPF = 7 kHz SSOP10-P-0.65A (0.65 mm pitch) Block Diagram Pin Connection (top view) C4 C3 C1 1 9 R1 8 R2 7 50 MΩ 2 − OPAMP DIFF & LPF ×5 7 kHz REF 3 − OPAMP 1.7 V 1.3 V 0.9 V − + OP-AMP 6 VCC SOA 1 10 OUT SIA 2 9 DO SIB 3 8 AI SOB 4 7 AO GND 5 6 VCC + Comparator − + − Comparator 5 50 MΩ C2 4 10 1 2003-11-25 TA6038FN/FNG Pin Function Pin No. Pin Name Function 1 SOA Amp (A) output terminal 2 SIA Connection terminal of shock sensor 3 SIB Connection terminal of shock sensor 4 SOB Amp (B) output terminal 5 GND Ground terminal 6 VCC Power supply voltage 7 AO Op-Amp output terminal 8 AI Op-Amp input terminal 9 DO Differential-Amp output terminal 10 OUT Output terminal (output = “L” when shock is detected.) Maximum Ratings (Ta = 25°C) Characteristics Power supply voltage Symbol Rating Unit VCC 7 V Power dissipation PD 300 mW Storage temperature Tstg −55 to 150 °C Rating Unit Recommend Operating Condition Characteristics Symbol Power supply voltage VCC 2.7 to 5.5 V Operating temperature Topr −25 to 85 °C Note: The IC may be destroyed due to short circuit between adjacent pins, incorrect orientation of device’s mounting, connecting positive and negative power supply pins wrong way round, air contamination fault, or fault by improper grounding. 2 2003-11-25 TA6038FN/FNG Electrical Characteristics (unless otherwise specified, VCC = 3.3 V, Ta = 25°C) Symbol Test Circuit Test Condition Min Typ. Max Unit Supply voltage VCC ⎯ ⎯ 2.7 3.3 5.5 V Supply current ICC (1) VCC = 3.3 V ⎯ 1.8 2.5 VCC = 5.0 V ⎯ 1.8 2.5 Symbol Test Circuit Test Condition Min Typ. Max Unit Characteristics mA (DIFF-AMP) Characteristics Zin ⎯ ⎯ 30 100 ⎯ MΩ Gain GvBuf (2) ⎯ 13.6 14 14.4 dB Output DC voltage VoBuf (3) Connect C = 1000 pF between 1 pin and 2 pin, 3 pin and 4 pin 0.7 1 1.3 V fc (4) Frequency at −3dB point 5 7 11 kHz Output source current IBso (5) Voh = VCC − 1 V 300 800 ⎯ µA Output sink current IBsi (6) Vol = 0.3 V 75 130 ⎯ µA Typ. Max Unit Input impedance (Note 1) Low pass filter cut-off freq. Note 1: Marked parameters are reference data. (OP-AMP) Characteristics Symbol Test Circuit Test Condition Min Cut-off frequency (Note 1) fT ⎯ ⎯ 1.5 2 ⎯ MHz Openloop gain (Note 1) Gvo ⎯ ⎯ 80 90 ⎯ dB Vin1 (7) ⎯ 1.235 1.3 1.365 V Input voltage 1 Iin (8) ⎯ ⎯ 25 50 nA Voff ⎯ ⎯ −5 0 5 mV Output source current IAso (9) Voh = VCC − 1 V 250 800 ⎯ µA Output sink current IAsi (10) Vol = 0.3 V 130 200 ⎯ µA Input current Offset voltage (Note 1) Note 1: Marked parameters are reference data. (window-comparator) Symbol Test Circuit Test Condition Min Typ. Max Unit Vtrp1 ⎯ ⎯ Vin1 ±0.38 Vin1 ±0.4 Vin1 ±0.42 V Output source current IWso (11) Voh = VCC − 0.5 V 30 50 ⎯ µA Output sink current IWsi (12) Vol = 0.3 V 300 800 ⎯ µA Characteristics Trip voltage 1 (Note 1) Note 1: Marked parameters are reference data. 3 2003-11-25 TA6038FN/FNG Application Note 1.7 V C1 C4 1 R2 2 Shock sensor Qs (pC/G) 50MΩ LPF ×5 9 C3 R1 7 8 10 50MΩ 3 C2 4 1.3 V 0.9 V Figure 1 The Configuration of G-Force Sensor Amplifier Figure 1 shows the configuration of G-Force sensor amplifier. The shock sensor is connected between the pins 2 and 3. < How to output 0 or 1 from the pin 10 to detect whether there is a shock or not. > – Using a sensor with the sensitivity Qs (pC/G) to detect the shock g (G). – a. Setting gain: C1 = C2 (pF), R1 (kΩ), R2 (kΩ) Example: Detecting 5 (G)-shock using a sensor with Qs = 0.34 (pC/G), R1 = 10 (kΩ), R2 = 100 (kΩ). Qs × g R2 ×2×5× = 0.4 (V) C1 R1 C1 = C2 = Qs × g R2 × 0.04 R1 C1 = C2 = 0.34 × 5 100 × = 425 (pF) 0.04 10 b. Setting the frequency (Hz) of HPF: Setting C3 (µF), R1 (kΩ) fc (Hz) = 1 × 103 2 × π × R1 × C3 Example: Setting the frequency to 20 Hz with R1 = 10 (kΩ). C3 = 1 × 103 = 0.8 (µF) 2 × π × 10 × 20 c. Setting the frequency (kHz) of LPF: Setting C4 (pF), R2 (kΩ) fc (kHz) = Example: Setting the frequency to 5 kHz with R2 = 100 (kΩ). 1 × 106 2 × π × R2 × C4 C4 = 1 × 106 = 318 (pF) 2 × π × 100 × 5 < How to output the voltage according to the shock through the pin 7. > – Using a sensor with the sensitivity Qs (pC/G), and assuming the shock sensitivity of the system is Vsystem (mV/G). – a. Setting gain: C1 = C2 (pF), R1 (kΩ), R2 (kΩ) Example: Designing the system with 200 (mV/G) by using a sensor that Qs = 0.34 (pC/G), R1 = 10 (kΩ), R2 = 100 (kΩ). Qs R2 ×2×5× = Vsystem × 103 (mV/G) C1 R1 C1 = C2 = Qs R2 × × 10 4 (pF) Vsystem R1 C1 = C2 = 4 0.34 100 × × 10 4 = 170 (pF) 200 10 2003-11-25 18 kΩ 8 kΩ 8 kΩ AMP 20 µA 20 µA 8 5 1 kΩ 250 Ω 1.5 kΩ 500 Ω 9 10 50 µA VREF 1.7 V 50 µA 100 Ω 10 µA 50 µA 100 Ω 10 µA TA6038FN/FNG Equivalent Circuit 7 7 10 kΩ 2003-11-25 TA6038FN/FNG Test Circuit Supply current ICC 10 9 8 7 6 1 2 3 4 5 M (2) 2 MΩ 2 MΩ 3.3 V (1) DIFF-AMP Gain GvBuf Step 1 Step 2 M1 M2 M 9 8 7 6 1 2 3 4 5 10 9 8 7 6 1 2 3 4 5 2 MΩ 2 MΩ (4) Gain = Μ2 − Μ1 0.68 − 0.52 DIFF-AMP Low pass filter cut-off freq. fc M 9 8 7 6 1 2 3 4 5 10 9 8 7 6 1 2 3 4 5 2 MΩ 2 MΩ 2 MΩ 1000 pF 3.3 V 10 3.3 V M 2 MΩ 0.52 V 0.68 V 2 MΩ 2 MΩ DIFF-AMP Output DC voltage VoBuf 1000 pF (3) 2 MΩ 0.68 V 0.68 V 2 MΩ 2 MΩ 3.3 V 10 3.3 V M 100 pF 6 2003-11-25 TA6038FN/FNG (5) DIFF-AMP Output source current IBso (6) 9 8 7 6 1 2 3 4 5 10 9 8 7 6 1 2 3 4 5 2 MΩ OP-AMP Input voltage 1 Vin1 10 kΩ (7) 2 MΩ 2 MΩ 2 MΩ 2 MΩ 2 MΩ 3.3 V 10 0.3 V M 3.3 V 2.3 V M DIFF-AMP Output sink current IBsi M 9 8 7 6 1 2 3 4 5 7 6 3.3 V 10 (8) OP-AMP Input current Iin 10 9 8 3.3 V 1.1 V M 1 (9) 2 3 4 5 Μ 2 OP-AMP Output source current IAso (10) OP-AMP Output sink current IAsi 8 7 6 1 2 3 4 5 10 9 8 7 6 1 2 3 4 5 3.3 V 9 1.5 V 10 0.3 V M 3.3 V 1.1 V 2.3 V M 7 2003-11-25 TA6038FN/FNG 7 6 1 2 3 4 5 M 10 9 8 7 6 1 2 3 4 5 10 9 8 7 6 1 2 3 4 5 3.3 V 8 0.3 V 9 1.5 V 10 0.8 V M (12) Window comparator Output sink current IWsi 3.3 V 2.85 V 1.5 V 1.3 V (11) Window comparator Output source current IWso Test Circuit (for reference) DIFF-AMP CMRR (b) DIFF-AMP PSRR M 9 8 7 6 1 2 3 4 5 3.3 V 10 150 pF 150 pF 300 pF 300 pF 150 pF 4.5 V M 300 pF (a) 8 2003-11-25 TA6038FN/FNG Package Dimensions Weight: 0.04 g (typ.) 9 2003-11-25 TA6038FN/FNG RESTRICTIONS ON PRODUCT USE 030619EAA • The information contained herein is subject to change without notice. • The information contained herein is presented only as a guide for the applications of our products. No responsibility is assumed by TOSHIBA for any infringements of patents or other rights of the third parties which may result from its use. No license is granted by implication or otherwise under any patent or patent rights of TOSHIBA or others. • TOSHIBA is continually working to improve the quality and reliability of its products. Nevertheless, semiconductor devices in general can malfunction or fail due to their inherent electrical sensitivity and vulnerability to physical stress. It is the responsibility of the buyer, when utilizing TOSHIBA products, to comply with the standards of safety in making a safe design for the entire system, and to avoid situations in which a malfunction or failure of such TOSHIBA products could cause loss of human life, bodily injury or damage to property. In developing your designs, please ensure that TOSHIBA products are used within specified operating ranges as set forth in the most recent TOSHIBA products specifications. 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Unintended Usage of TOSHIBA products listed in this document shall be made at the customer’s own risk. • TOSHIBA products should not be embedded to the downstream products which are prohibited to be produced and sold, under any law and regulations. 10 2003-11-25